TSOP11 Vishay, TSOP11 Datasheet - Page 5

• Manufacturer Part Number: TSOP11
• Description: Ir Receiver Modules For Remote Control Systems
• Manufacturer: Vishay

TSOP11..
Vishay Semiconductors
Suitable Data Format
The circuit of the TSOP11.. is designed so that unex-
pected output pulses due to noise or disturbance sig-
nals are avoided. A bandpass filter, an integrator
stage and an automatic gain control are used to sup-
press such disturbances.
The distinguishing mark between data signal and dis-
turbance signal are carrier frequency, burst length
and duty cycle.
The data signal should fulfill the following conditions:
• Carrier frequency should be close to center fre-
quency of the bandpass (e.g. 38 kHz).
• Burst length should be 6 cycles/burst or longer.
• After each burst which is between 6 cycles and 70
cycles a gap time of at least 10 cycles is necessary.
• For each burst which is longer than 1.8 ms a corre-
sponding gap time is necessary at some time in the
data stream. This gap time should have at least same
length as the burst.
www.vishay.com
60
95 11339p2
1.0
0.9
0.8
0.7
0.6
Figure 13. Vertical Directivity ϕ
d
rel
0.4
- Relative Transmission Distance
0.2
0
0°
0.2
10°
0.4
20°
y
0.6
30°
40°
50°
60°
70°
80°
• Up to 2200 short bursts per second can be received
continuously.
Some examples for suitable data format are: NEC
Code, Toshiba Micom Format, Sharp Code, RC5
Code, RC6 Code, RCMM Code, R-2000 Code,
RECS-80 Code.
When a disturbance signal is applied to the TSOP11..
it can still receive the data signal. However the sensi-
tivity is reduced to that level that no unexpected
pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP11.. are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signal at 38 kHz or at any other fre-
quency
• Signals from fluorescent lamps with electronic bal-
last (an example of the signal modulation is in the fig-
ure below).
Figure 14. IR Signal from Fluorescent Lamp with low Modulation
16920
0
IR Signal from fluorescent
lamp with low modulation
5
Time (ms)
10
Document Number 82006
15
Rev. 1.13, 19-Jan-07
20